Question

The infectious stage of Plasmodium is

• A. Sporozoite
• B. Cryptozoite
• C. Trophozoite
• D. Merozoites

Answer 1

The correct option is A Sporozoite

The Plasmodium zygote becomes oocyst in the midgut of the mosquito and releases spores called sporozoites that move to the salivary glands. These sporozoites enter into the bloodstream of humans when the vector mosquito bites the human.

A. Sporozoites are spores made in the mosquito and infect the human body. It is the infectious stage.

B. Cryptozoites are made in the liver of the humans before they invade the RBCs.

C. Trophozoites are the ring stage cells formed in the RBCs, that release more of merozoites.

D. Merozoites are the asexual spores that are released both in the liver and RBCs and cause the symptoms of malaria in the human body.

Hence, the correct answer is 'Sporozoite'